Method of forming wheel-hubs.



J. KBLSEY.

METHOD OP FQRMING WHEEL HUBS. APFLIGATION FILED DEO. 8, 1914.

Lmggw@ meme@ Mar. 2, 1915.

2 SHEETS-SHEET l /1 TTOR/VEKS J. KELSEY. l METHOD OFIIORMING WHEEL. HUBS.

APPLICATION FILED DEG. B, 1914.

Patented Mar. 2, 1915.

SHEETS-SHEET 2.

A TT DRIVE V18 JOHN KELSEY, OF DETROIT, MICHIGAN.

METHOD 0F FORMING WHEEL-HUBS.

To all whom t may concern:

Be it known that I,l JOHN KELSEY, acitizen of the United States of America, residing at Detroit, in thecounty of Wayne and State of Michigan, have invented vcertain new and useful Improvements in Methods of Forming Wheel-Hubs, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to wheel hubs of the type provided with an enlarged recess for the reception of roller bearings, and the invention comprises the novel method of forming said-hub of a reinforced pressed sheet metal meinbei' as hereinafter set forth.

In the. drawings: Figure 1 is a longitudinal section through-tlie pressed sheet metal member; Fig. 2 is an end 'elevation thereof; Fig. il shows the bushing for reinforcing the pressed sheet metal member; Fig. 4 illustrates the manner of breaching the outer surface of the bushing to form longitudinal A serrations therein; Fig. 5 shows the manner of breaching the pressed sheet metal member to form complementary serrations in the inner surface thereof; Fig. (lis a cross section through the pressed sheet metal member and bushing in engagement with each other; Fig. 7 is a. longitudinal section showing the manner of brazing the joint; and Fig. 8 is a similar view showing the truing operation.

'It is `the primary object of the invention to cheapen the cost of manufacture by substituting for a forged blank a blank formed of a pressed sheet metal member having a bushing or' reinforcement for increasing the thickness of the walls thereof. i It is essential that the bushing and the blank should be so united as to carry heavy torsional stresses from one "to `the other and itis equally.importantthat this should be accomplished without thinning oi weakening the sheet metal wall. To accomplish this result I first form by pressing operations a sheet metal member A having the cylindrical portion B. and outwardly-extending flange C, and a cylindrical portion D of lesserdiameter than the portion B connected therewith by the flaring portion E. I then form a bushing member F, preferably from a forging, which is bored preferably with a tapering hole G for fitting a correspondingly tapered portion of the axle, A'

Specification of Letters Patent.

application inea December s, 1914i. seriai No. 876,094.y

splineway H is also formed along the bore i nr for keying the bushing to the. shaft. The

outer surface of the member F is'then fash ioned by a broachmg operation, as shown In Fig. 4,- so as to form a circumferential series -of longitudinally-extending serrations I.

The member A is internally broached, as shown in Fig. 5, to form a'complementary series vof serrations adapted to engage and interlock with the pserrationson the member F. The two members are then pressed together with the member F projecting a short distance beyond the flaring portion E, as

shown at F', into the. cylindrical recess of vblank to form a flanged cylindrical portion,

forining a bushing for -said cylindrical por# tion, breaching the louter surface of said bushing and the inner surface of said cylindricalpor'tion to form complementary interengageable serrations, pressing said mem- .bers into engagement with each other and 'truing the completed structure Aconcentric with the bore of the bushing.

2. The method of forming wheel hubs, comprising the pressing of a sheet metal blank to form a flanged cylindrical member, forming a bushing for the cylindrical portion of said member, breaching the outer surface of said bushing and inner surface of said cylindrical member to -form complementary inter-engageable Serrations therein, pressing said members together, and brazing the joint between said members.

3. The method of forming wheel hubs, comprising the pressing of a sheet metal blank to form a member having cylindrical portions of different diameters and an outwardly-extending Harige, forming a bushing for the cylindrical portion of lesser dialneter, breaching the outer face of said bushing and inner face of said cylindrical member f messes to produoe complementary? hier-engageabe serrtions, pressing said"bushng mto engagement with said sheet motel member with -an end portion-of theV bushing projecting into a. recess formed by the enlarged cylindrcal. portion of the sheet metal member, placing a, fusible adhesive metal around said projeoing porono the bushing, and hee.-k

L. H. MCCRAGKEN, L. C. BROOKS. 

